Pergola Roof Rafter Spacing

The key thing to remember when it comes to determining pergola rafter spacing is that you cannot go more than 16 inches from center to center between rafters.

Pergola roof rafter spacing.

Posts will be 6 x6 and will be notched to accept a sandwich beam of two 2 x s. Spacing the rafters 16 to 20 inches apart is common. So can six tall pergola posts really be anywhere between one and five feet apart. Patio roof maximum beam rafter spans beamsmeasuring pergola dimensions learn the standardwhat is max distance between posts using 2x12x20 foot beams for apergola beam span calculator.

The average pergola structure is usually between four and eight feet tall and eight feet and taller. When rafters are on 3 foot centers i typically space the purlins 19 inches. In our example showing a 13 x19 big kahuna freestanding pergola this calculation would be. Patio roof maximum beam rafter spans what is max distance between posts pergola main beams span building span tables for 8 x12 x24 western red pergola beam span calculator.

An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. The most important rule in spacing is to keep the distance consistent between all the rafters. With a good design and a well thought out plan a homeowner can create a classic and relaxing outdoor setting that they will enjoy using for years to come.

Across the beams the rafters will be 2 x6 s on 8 centers which should be sufficient given their 4 6 spans. When pergola rafters are on 2 foot centers 16 inch purlin spacing looks good. Builders aren t bound by standard rafter spacing measurements. To calculate your rafter length for a freestanding pergola it is measurement a 3.

Take note of this measurement as this will be the first number in the size pergola you choose. But they do tend to space rafters in one of several industry standard increments typically either 12 16 or 24 inches apart. The only hard and fast rule of rafter spacing. Install the front and rear rafters first fastening them to the face of the support posts above the girder.

10 1 6 1 6 13 rafter length of 13 feet.